100mL power dispensing funnel with side-operated screw feed instrument for addition of powders and solids, up to 25 mesh, to reactions without problems of seizing or binding. Features a flexible PTFE screw thread wrapped on a precision PTFE-ceramic shaft, and contained within a precision-bore housing. Completely inert materials allow flushing with solvents without fear of contamination. #15 Ace-Thred offers easy disassembly for cleaning. Large 11/4 knob for smooth and easy turning. 24/40 top female and bottom male joints. 14/20 joint atop inner male joint for easier cleaning.